filter-lighting-region.svg

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<!--

     Any copyright is dedicated to the Public Domain.

     http://creativecommons.org/publicdomain/zero/1.0/

-->

<svg xmlns="http://www.w3.org/2000/svg" width="600px" height="300px">

  <!-- From https://bugzilla.mozilla.org/show_bug.cgi?id=1203376 -->

  <defs>

    <!-- the filter lights are intentionally chosen to fill the entire area with

         a solid color since we're only testing the extents of the filter region

-->

    <filter id="diffuse" x="-50%" y="-50%" width="200%" height="200%">

      <!-- gives a black filter region -->

      <feDiffuseLighting lighting-color="black">

        <feDistantLight />

      </feDiffuseLighting>

    </filter>

    <filter id="specular" x="-50%" y="-50%" width="200%" height="200%">

      <!-- gives a white filter region -->

      <feSpecularLighting lighting-color="white" specularConstant="100">

        <feDistantLight elevation="90"/>

      </feSpecularLighting>

    </filter>

  </defs>

  <rect x="100" y="100" width="100" height="100" filter="url(#diffuse)" />

  <rect x="340" y="40" width="220" height="220" fill="grey" />

  <rect x="400" y="100" width="100" height="100" filter="url(#specular)" />

</svg>